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Assertion : When Air is blow on a plasti...

Assertion : When Air is blow on a plastic cover, lying on the floor. If flies to a particular height in different directions. Also It's energy at different positions keep changing.
Reason : Work done by the force on the body changes the kinetic energy of the body. This is called Work - Energy Theorem. i.e., `W = Delta K.E.`

A

Assertion and Reason are correct and Reason is the correct explanation of Assertion

B

Assertion and Reason are true but Reason is the false explanation of the Assertion

C

Assertion is true - but Reason is false

D

Assertion is false but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
A
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Jogging every day is good for health. Assume that when you jog a work of 500 kJ is done and 230 kJ of heat is given off. What is the change in internal energy of your body?

Jogging everyday is good for health. Assume that when you jog a work of 500 kJ is done and 230 kJ of heat is given off. What is the change in internal energy of your body ?

Knowledge Check

  • If the work done by force on the body is positive then its kinetic energy

    A
    increase
    B
    decreases
    C
    zero
    D
    either increase or decreases

  • If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then …………… .

    A
    `W=0`
    B
    `Q=W=O`
    C
    `E=0`
    D
    `Q=o`

  • Assertion : When a Rubber band is stretched to a particular length, there is a change in length as well as the elastic potential energy is increased i.e., U=(1)/(2)Kx^(2) Reason : A bullet shot from the gun if embedded in a long of wood. Kinetic Energy is not conserved, but momentum is conserved, but momentum is conserved. The loss in kinetic is Delta theta = K.E_(i)-K.E_(f)

    A
    Assertion and Reason are correct and Reason is the correct explanation of Assertion
    B
    Assertion and Reason are true but Reason is the false explanation of the Assertion
    C
    Assertion is true - but Reason is false
    D
    Assertion is false but Reason is true

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